Journal of Organic Chemistry p. 7306 - 7315 (1994)
Update date:2022-08-03
Topics:
Molina, Pedro
Alajarin, Mateo
Sanchez-Andrada, Pilar
Elguero, Jose
Jimeno, Maria Luisa
A one-pot synthesis of cyclic carbodiimides which involves reaction of C,C-bis(aryliminophosphoranes) connected by aliphatic bridges with Boc2O in the presence of DMAP is described.The method is also applicable when a heteroatom such as oxygen or nitrogen is incorporated into the tether connecting the two aromatic rings.A conformation study has been carried out on carbodiimide 23a, which possess a central nine-membered ring, using 1H NMR spectroscopy and semiempirical as well as molecular mechanics calculations.
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